BootstrapMethodError is thrown for the following code:

interface Fun {
    <T extends String & Runnable> String m(T p);
}

class A {
    public static <S extends Runnable> String methodS(S a) {
        return null;
    }

}

public class Test {
    public static void main(String argv[]) {
        Fun f = A::methodS;
    }
}


Exception in thread "main" java.lang.BootstrapMethodError: call site initialization exception
at java.lang.invoke.CallSite.makeSite(CallSite.java:328)
at java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:307)
at java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:297)
at Test.main(Test.java:14)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:484)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: java.lang.invoke.LambdaConversionException: Type mismatch for lambda argument 0: class java.lang.String is not convertible to interface java.lang.Runnable
at java.lang.invoke.AbstractValidatingLambdaMetafactory.validateMetafactoryArgs(AbstractValidatingLambdaMetafactory.java:267)
at java.lang.invoke.LambdaMetafactory.metafactory(LambdaMetafactory.java:303)
at java.lang.invoke.CallSite.makeSite(CallSite.java:289)
... 8 more